V. L. Gurevich

Anharmonicity, vibrational instability, and the Boson peak in glasses

We show that a vibrational instability of the spectrum of weakly interacting quasilocal harmonic modes creates the maximum in the inelastic scattering intensity in glasses, the Boson peak. The instability, limited by anharmonicity, causes a complete reconstruction of the vibrational density of states (DOS) below some frequency

Pressure dependence of the boson peak in glasses

{\ensuremath{\omega}}_{c},

Disorder-Induced Low-Frequency Noise in Small Systems: Point and Tunnel Contacts in the Normal and Superconducting State

proportional to the strength of interaction. The DOS of the new harmonic modes is independent of the actual value of the anharmonicity. It is a universal function of frequency depending on a single parameter \char22{} the Boson peak frequency

The Boltzmann-equation description of transport in superconductors

{\ensuremath{\omega}}_{b}

Is weak temperature dependence of electron dephasing possible

which is a function of interaction strength. The excess of the DOS over the Debye value is

Possible weak temperature dependence of electron dephasing

\ensuremath{\propto}{\ensuremath{\omega}}^{4}

Phonon generation by current-carrying nanostructures

at low frequencies and linear in

Quasi-localized vibrations, boson peak and tunneling in glasses

\ensuremath{\omega}

Shot noise of Coulomb drag current

in the interval

Anharmonic potentials and vibrational localization in glasses

{\ensuremath{\omega}}_{b}\ensuremath{\ll}\ensuremath{\omega}\ensuremath{\ll}{\ensuremath{\omega}}_{c}.